Big changes could be on the horizon for the Siri personal assistant. According to reports, Apple is planning to launch an SDK for Siri at WWDC next month. This would open the voice assistant to third-party developers. Apple is also said to be working on new hardware to compete with the Amazon Echo and Google Home.

Google's developer's conference, Google I/O, is scheduled to kick off on Wednesday, May 18, at the Shoreline Amphitheater in Mountain View, California. The three day event will include a two hour keynote where Google CEO Sundar Pichai will discuss product and platform innovation. The event will also include a variety of other talks focused on Google services, such as its ad platform and Android. People attending the event can download the recently updated Google I/O app to access the conference map, create personal schedules and set up event notifications.

Google has added a new "Goals" feature to its Calendar app for busy iPhone owners. The app now helps users by searching their Calendar app and scheduling the best time for completing personal goals. The app will also automatically reschedule a goal if it conflicts with a new event, and users can defer goals if they can't be completed at the scheduled time. The update comes as part of the app's tenth anniversary.

Apple stock (NASDAQ:AAPL) opened on Monday at $96.16, and during the trading day Google's parent company Alphabet (NASDAQ:GOOG) briefly surpassed Apple as the most valuable company in the world. After Apple's earnings report hit, prices remained under $100. Alphabet also released a strong earnings report last week. Continuing the lackluster news for Apple, the company expects iPhone sales to decline year-over-year for the first time next quarter. Investors are concerned as the iPhone represents a majority of Apple's overall revenues. Both Alphabet and Apple are valued in the low to mid-$500 billion range.